Air heater for charge-forming devices



April, 17, 1928.

v 1,666,147 A. G. REDMOND AIR HEATER FOR CHARGE FORMING DEVICES Filed Dec. 15. 1919 Patented Apr. l7, 1928. I a I UN E -"STATE ArE-Nror ALBERT e. REDMOND, "INnIANAPo Is, INDIA-NA, Ass eNoRf'r'o THE hammersc QB RETE COMPANY, orfrtm'r, MICHIGAN, A coar'oaA'rIou or mmnua L AIR HEATER FOR CHARGE-FOBMING DEVICES.

Application'filed December ;1919; Serial No. 344,931.,

' This invention relates to an air heater for charge forming device used in 'connection with internal combust on eng1nes,'the ob ect being lZO'PIOVIdG a heating dev ce which is arranged at the air inlet of the charge forming device whereby'the air before it enters nected to the exhaust pipe of thevinternal' a through the heating device whereby the air 7 the charge forming device will be quickly heated so as to allow the charge forming device to form a perfect combustible mixture n a a I v v a v Another andz'further object ofmy invention is to provide a heater which is so concombustion engine" that the exhaust gases can be diverted from their natural path of travel entering the carburetor will be quickly heat ed in order to allowthe engine to be quickly warmed-upiwithoiitjtheadditional use of fuelj A still further objectof the inventionv is to provide'a heater having a plurality of radiating fins" forming a plurality of air passages through whichthe 'air passes in its passage to the: charge formingdevicejin orv der to enable the air to be quickly heated in starting the motor to which the ing device is attached; Y a

A still further object ofthe inventionis to provide an-air heater for afchargefforming device for an internal combustion engine which 1s under the control of the operator whereby the exhaust gases can be diverted I from'the natural path of travel, to the heat- I ing device or allowed to travel in their usual course to the mufller. Other and further objects and advantages 'of the invention will be hereinafter set forth and the novel features thereof defined by the of my improved construction of air heater appended claims;

In the drawings Figure 1 is a side elevation combustion engine showing the application 1 for the charge forming device.

Figure 2 is an enlarged longitudinal section through theheater; and

Figure 3 is an end'view of the heater. In the drawing 1 indicates an internal combustion engine provided'with the usual intake manifold 2 to which is connected the charge forming device 3 whichis provided with an air inlet 4. The internal combustion engine is provided with an exhaust manifold ,ed apertures 9'and 10-111 \jvhichv are secured pipescll and 12 and whileI haveShowncharge form-v of an internal the operation ofmy'improved construction of air heater for charge forn'iing-devices can end of which'extends the exhaustpipe 8 leading to themuflier in the ordinary manner. Coupling member is provided with threadrigid pipes mounted -in theseapertures; it is 00' I to the coupling member 7 from the opposite v of course understood-that flexible tubes can be used and I "do not wish to limit myself tov the use of'any particular kind of tube or manner 0of securing the same within the apertures 9 and 10. The couplingmember 7- a V p has a' valve stem. 13 extending transversely.

therethroughcarrying a valve 14: for closing the passagev whereby theexhaust gases from the internal combustion. engine" will be dis) charged'through the aperture 9 into the tube 1-1. The valve stem 13 carries an: arm '15 to which isconnected a'rod l6 .extending which the internal combustion engine, is-in- I throughthedash 17 a of the motor vehicle in stalled, said rod havinga knob18 for operatingthe same and it willbe seen that by'this shape having a closedend 22 and provided u with longitudinally disposed partition23 which'terminates short of the closed endeain order to cause the exhaust gases entering the opening 19 to pass around thefend of the partition and out of the opening20.

:The outer face of the tubular casting formingthe heater proper is prov'idedwith a longitudinally disposed fins o'r ribs 24: over which is arranged a shell 25 whichis provided with a couplingportion 26 adapted to be connected to the air intake tof the charge forming device. shortof the enlarged portion ofthe casting 2,1 in order to allow air to pass into theair passageways'formed by the fins and shell. It

will be seen by thisconstruction a plurality of air passages are formed by-the fins and shell whereby the air in its passage through The shell 25 termina'tesf no 1 I these passageways will be quickly and thoroughly heated before it enters the air intake now in use.

In the operation of the heater as herein shown assuming that the valve in coupling member 7 of the exhaust line pipe is in closed position when it is desired to start the internal combustion engine the rod 16 is pulled out by the operator grasping the knob 18 into the position shown in Figure 1 which moves the valve into closed position as shown in dotted lines in Figure 2 and as the exhaust gases are expelled through the exhaust manifold they pass down through the aper ture 9 tln'oughthe pipe 11 into the heater which is located at the air inlet of the charge forming device. The exhaust gases'entering the heater are caused to travel longitudi' nallyof the heater towards the closed end around the end of the partition and then back and are conveyed by the pipe 12 into the coupling member 7 to the other side of the valve 1 1 and are carried to the muliier in the ordinary manner. As the entire vol ume of exhaust gases is carried through the heater which is formed of a metal casting with'a plurality of fins the same quickly becomes heated and as the air is caused to enter the charge forming device through a plurality of air passages'separated by radiating lins the air is quickly heated so that the air admitted to the charge forming device quickly heats the same in order to allow a perfect combustible mixture to be produced.

From the foregoing description it will be seen that I have provided an air heater for a charge forming devlce which is located at the air inlet of the charge forming device and. it is provided with means for diverting the exhaustgases from the exhaust line pipe through the same so as to quickly heat the air in its passage to the charge forming device and while I haveshown certain details of construction Ido not wish to limit, myself to the particular construction of heater and manner of connecting'the same as shown as my invention consists in broadly locating a heater at the air inlet of a charge forming device and means provided for conveying the exhaust gases directly to said heater so as to allow the heater to become hot'quickly in order to produce a high explosive charge without the additional use of extra fuel as now employed when warming up an internal combustion engine. 1

What I claim is V The combination with an internal combustion engine having an intake manifold and exhaust manifold, of a charge forming device connected to the intake manifold and having an air inlet, a casting arranged at the outlet of said'exhaustlmanifold having a valve-for controllingthe passage of exhaust gases therethrough,Isaid casting having outletand inlet apertures, a tubular shaped member having aclosedendand arovided with a longitudinally disposed partition terminating short of its closedvend and connectedfto said apertures of said casting by pipes formingiapassageway forthe exhaust gases when said valve is in closed position, said tubular member being provided with longitudinally disposed fins and a shell of a larger diameter than said tubular member arranged over said tubular member upon said fins, said shell being connected to the air inlet of said carbureter.

In testimony whereof I'have hereunto affixed mysignature. t

ALBERT e. REDMOND. 

